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-rw-r--r--mysql-test/main/func_gconcat.test10
1 files changed, 10 insertions, 0 deletions
diff --git a/mysql-test/main/func_gconcat.test b/mysql-test/main/func_gconcat.test
index 2ab856e0edd..3c21aa04ffc 100644
--- a/mysql-test/main/func_gconcat.test
+++ b/mysql-test/main/func_gconcat.test
@@ -939,6 +939,16 @@ DROP VIEW v1;
DROP TABLE t1;
+
+--echo #
+--echo # MDEV-4677 GROUP_CONCAT not showing any output with group_concat_max_len >= 4Gb
+--echo #
+set group_concat_max_len=1024*1024*1024*4;
+create table t1 (i int, j int);
+insert into t1 values (1,1),(1,2);
+select i, group_concat(j) from t1 group by i;
+drop table t1;
+
--echo #
--echo # End of 10.2 tests
--echo #